The ocean plays an essential role in regulating the world's climate. The latest addition to the Youth and United Nations Global Alliance (YUNGA) challenge badge series is designed to help educate children and young people about the vital role the ocean plays in supporting life on Earth. The badge looks at how people live by, explore and use the coast, the seas and marine products, describing the effect this has on the marine environment and offering ideas on how individuals can take action to help make this close relationship more sustainable. This material is appropriate for use in school classes, Guide or Scout groups or youth meetings generally. Dive in and discover activities that you can do to help protect the ocean!